Gene Autry works for the Forestry Service. He shoots at a wildcat with his new rifle, but misses. Meanwhile Damian O'Flynn shoots and kills forest ranger Jason Robards Sr, who has been lax in enforcing regulations, but has reached his limit. Gene thinks he killed Robards, until it later turns out that he couldn't have. Time to investigate. Meanwhile, moths are infesting the forest, killing the trees, which suits loggers Douglas Dumbrille, O'Flynn, and company just fine. If the trees are dead, they can harvest them all. When Autry starts supervising dousing everything in DDT, they spread rumors about its deadliness, and poison animals nearby to make the lie look better.
It's a well written episode in Autry's films for Columbia, even if the evidence of DDT's major problems became evident in the decade following. Jimmy Lloyd is on hand as Gene's frequently depressed assistant; his wife, played by a picture of Marilyn Monroe, died while he was at war. Clayton Moore is a henchman, and Leon Weaver is present to please fans who missed his appearances in Republic Pictures movies. Gene sings several songs, including "It's My Lazy Day" and "Hair of Gold", backed by the Cass County Boys, and we can be assured that everything will turn out all right within 70 minutes.